JC27 If the subdomain name changes at the host, the subdomain record at Ezoic needs to be updated as well. This may be the case for the subdomain. Ezoic actually doesn't control the host DNS records but rather needs to be an exact replica of the host DNS records. You can update the subdomain record in the Ezoic DNS records if it doesn't match.
To make this change, you can go to your Ezoic dashboard > Settings > DNS > click on the pencil icon to update a record.